diff --git a/apps/explorer/lib/explorer/chain.ex b/apps/explorer/lib/explorer/chain.ex
index e830709500..5974406e6c 100644
--- a/apps/explorer/lib/explorer/chain.ex
+++ b/apps/explorer/lib/explorer/chain.ex
@@ -40,6 +40,7 @@ defmodule Explorer.Chain do
     SmartContract,
     StakingPool,
     Token,
+    Token.Instance,
     TokenTransfer,
     Transaction,
     Wei
@@ -2973,6 +2974,16 @@ defmodule Explorer.Chain do
     end
   end
 
+  @spec upsert_token_instance(map()) :: {:ok, Instance.t()} | {:error, Ecto.Changeset.t()}
+  def upsert_token_instance(params) do
+    changeset = Instance.changeset(%Instance{}, params)
+
+    Repo.insert(changeset,
+      on_conflict: :replace_all,
+      conflict_target: [:token_id, :token_contract_address_hash]
+    )
+  end
+
   @doc """
   Update a new `t:Token.t/0` record.
 
diff --git a/apps/explorer/lib/explorer/chain/token/instance.ex b/apps/explorer/lib/explorer/chain/token/instance.ex
index 90a6d671dc..0e704650a0 100644
--- a/apps/explorer/lib/explorer/chain/token/instance.ex
+++ b/apps/explorer/lib/explorer/chain/token/instance.ex
@@ -20,6 +20,7 @@ defmodule Explorer.Chain.Token.Instance do
           metadata: Map.t()
         }
 
+  @primary_key false
   schema "token_instances" do
     field(:token_id, :decimal, primary_key: true)
     field(:metadata, :map)
@@ -32,12 +33,14 @@ defmodule Explorer.Chain.Token.Instance do
       type: Hash.Address,
       primary_key: true
     )
+
+    timestamps()
   end
 
-  # def changeset(%Instance{} = instance, params \\ %{}) do
-  #   instance
-  #   |> cast([:token_id, :metadata, :token_contract_address_hash])
-  #   |> validate_required([:token_id, :token_contract_address_hash])
-  #   |> foreign_key_constraint(:token_contract_address_hash)
-  # end
+  def changeset(%Instance{} = instance, params \\ %{}) do
+    instance
+    |> cast(params, [:token_id, :metadata, :token_contract_address_hash])
+    |> validate_required([:token_id, :token_contract_address_hash])
+    |> foreign_key_constraint(:token_contract_address_hash)
+  end
 end
diff --git a/apps/explorer/priv/repo/migrations/20190905083522_create_token_instances.exs b/apps/explorer/priv/repo/migrations/20190905083522_create_token_instances.exs
index ef20e47e46..271b921dbb 100644
--- a/apps/explorer/priv/repo/migrations/20190905083522_create_token_instances.exs
+++ b/apps/explorer/priv/repo/migrations/20190905083522_create_token_instances.exs
@@ -13,6 +13,8 @@ defmodule Explorer.Repo.Migrations.CreateTokenInstances do
       )
 
       add(:metadata, :jsonb)
+
+      timestamps(null: false, type: :utc_datetime_usec)
     end
   end
 end
diff --git a/apps/explorer/test/explorer/chain_test.exs b/apps/explorer/test/explorer/chain_test.exs
index af00d78c12..9a665e7e7b 100644
--- a/apps/explorer/test/explorer/chain_test.exs
+++ b/apps/explorer/test/explorer/chain_test.exs
@@ -101,6 +101,63 @@ defmodule Explorer.ChainTest do
     end
   end
 
+  describe "upsert_token_instance/1" do
+    test "insert a new token instance with valid params" do
+      token = insert(:token)
+
+      params = %{
+        token_id: 1,
+        token_contract_address_hash: token.contract_address_hash,
+        metadata: %{uri: "http://example.com"}
+      }
+
+      {:ok, result} = Chain.upsert_token_instance(params)
+
+      assert result.token_id == Decimal.new(1)
+      assert result.metadata == params.metadata
+      assert result.token_contract_address_hash == token.contract_address_hash
+    end
+
+    test "replaces existing token instance record" do
+      token = insert(:token)
+
+      params = %{
+        token_id: 1,
+        token_contract_address_hash: token.contract_address_hash,
+        metadata: %{uri: "http://example.com"}
+      }
+
+      {:ok, _} = Chain.upsert_token_instance(params)
+
+      params1 = %{
+        token_id: 1,
+        token_contract_address_hash: token.contract_address_hash,
+        metadata: %{uri: "http://example1.com"}
+      }
+
+      {:ok, result} = Chain.upsert_token_instance(params1)
+
+      assert result.token_id == Decimal.new(1)
+      assert result.metadata == params1.metadata
+      assert result.token_contract_address_hash == token.contract_address_hash
+    end
+
+    test "fails to import with invalid params" do
+      params = %{
+        token_id: 1,
+        metadata: %{uri: "http://example.com"}
+      }
+
+      {:error,
+       %{
+         errors: [
+           token_contract_address_hash: {"can't be blank", [validation: :required]}
+         ],
+         valid?: false
+       }} = Chain.upsert_token_instance(params)
+    end
+  end
+
   describe "address_to_logs/2" do
     test "fetches logs" do
       %Address{hash: address_hash} = address = insert(:address)